Wire saw



FIG. 1 is a perspective view of a wire saw showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is an enlarged right side view thereof.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a wire saw, as shown. 